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GMC Truck
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1998
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K 3500 Truck 4WD V8-454 7.4L VIN J SFI
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Repair and Diagnosis
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Heating and Air Conditioning
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Testing and Inspection
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Symptom Related Diagnostic Procedures
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Diagnosis By Symptom
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Without A/C
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Temperature Control Effort
Temperature Control Effort
HIGH TEMPERATURE CONTROL EFFORT
A kinked control cable, a binding valve or a faulty
control assembly
are possible causes of excessive temperature control rotary knob effort.